A study in which subjects are assigned by the researcher into experimental and control groups increases
A) bias.
B) control.
C) manipulation
D) validity.

Question

Quizplus · Accepted Answer

Bias occurs when the attitudes or motivations of the researcher cause a deviation from a true measurement of the study variables.This may occur when researchers control assignment to study groups.Control is used to manage manipulation of variables and to reduce extraneous factors in the environment that might alter outcomes.Manipulation of independent variables is used to evaluate changes in dependent variables.Researcher control over assignment into groups does not increase a study's validity.

A Study in Which Subjects Are Assigned by the Researcher